CN112251207A - Temperature-resistant salt-resistant foaming agent and preparation method and application thereof - Google Patents
Temperature-resistant salt-resistant foaming agent and preparation method and application thereof Download PDFInfo
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- CN112251207A CN112251207A CN202011139320.7A CN202011139320A CN112251207A CN 112251207 A CN112251207 A CN 112251207A CN 202011139320 A CN202011139320 A CN 202011139320A CN 112251207 A CN112251207 A CN 112251207A
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- 239000004088 foaming agent Substances 0.000 title claims abstract description 138
- 150000003839 salts Chemical class 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims abstract description 38
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims abstract description 30
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 24
- 125000002091 cationic group Chemical group 0.000 claims abstract description 21
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000004094 surface-active agent Substances 0.000 claims abstract description 21
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229960004889 salicylic acid Drugs 0.000 claims abstract description 19
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 18
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 15
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims abstract description 15
- 239000011976 maleic acid Substances 0.000 claims abstract description 15
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000243 solution Substances 0.000 claims description 116
- 239000007864 aqueous solution Substances 0.000 claims description 20
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 claims description 8
- 229940107816 ammonium iodide Drugs 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 3
- 239000006260 foam Substances 0.000 abstract description 86
- 239000007788 liquid Substances 0.000 abstract description 25
- 239000008398 formation water Substances 0.000 abstract description 18
- 230000033558 biomineral tissue development Effects 0.000 abstract description 11
- 230000000052 comparative effect Effects 0.000 description 20
- 238000003756 stirring Methods 0.000 description 17
- 238000005187 foaming Methods 0.000 description 15
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 14
- 239000007789 gas Substances 0.000 description 10
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 238000007599 discharging Methods 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005380 natural gas recovery Methods 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention belongs to the technical field of foaming agents, and particularly relates to a temperature-resistant salt-resistant foaming agent, and a preparation method and application thereof. The temperature-resistant salt-resistant foaming agent provided by the invention comprises the following preparation raw materials in percentage by mass: 10-15% of dodecanol, 8-12% of maleic acid, 3-6% of salicylic acid, 25-33% of isoamyl alcohol, 18-22% of p-toluenesulfonic acid, 0.5-3% of sodium dodecyl sulfate, 0.5-3% of a cationic fluorocarbon surfactant and the balance of water. The method adopts simulated formation water to test the performance of the foaming agent, wherein the temperature of the simulated formation water is 180 ℃, the degree of mineralization is 150000g/L, when the mass concentration of the foaming agent in the simulated formation water is 0.3%, the surface tension of bubbles is 20.9-21.8 mN/m, the height of the foam is 200-235 mm when the foam foams for 3min, and the liquid carrying amount of the foam is 86-90 mL.
Description
Technical Field
The invention belongs to the technical field of foaming agents, and particularly relates to a temperature-resistant salt-resistant foaming agent, and a preparation method and application thereof.
Background
In the development process of the natural gas well, because of operations such as edge and bottom water propulsion, water injection driving, fracturing and the like, water is continuously accumulated in a shaft, so that the gas production is reduced and even killed. The common process for removing accumulated liquid from natural gas well in domestic and foreign oil and gas field is foam drainage, which is to form continuously rising foam column by using the action of natural gas and foaming agent dissolved in fluid in well to carry liquid and solid particles mixed therein out of well. Geological compositions in different regions are different, and formation water of different geology has different mineralization degrees, wherein the mineralization degree of the water is also called the salinity of the water. For the drainage problem of formation water with high mineralization degree (for example, the mineralization degree of the formation water in a gas field well of a place such as a Craya place, a Hull wall and the like can reach 150000mg/L), most of the existing foaming agents cannot ensure the drainage effect, and the gas field exploitation life can be seriously influenced and the natural gas recovery rate can be reduced. Meanwhile, the foaming performance of the existing foaming agent is greatly influenced by temperature, and the foaming capability and the stability of bubbles of the foaming agent are obviously reduced at higher temperature (higher than 90 ℃).
Therefore, how to obtain the temperature-resistant salt-resistant foaming agent enables the foaming agent to have good bubble stability and liquid carrying capacity under the condition of high mineralization and high temperature, so that the exploitation life of a gas field is prolonged, and the natural gas recovery ratio is improved is a technical problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problems, the invention provides a temperature-resistant salt-resistant foaming agent which has good bubble stability and liquid carrying capacity under the conditions of high temperature and high salinity.
The invention provides a temperature-resistant salt-resistant foaming agent which comprises the following preparation raw materials in percentage by mass:
preferably, the temperature-resistant salt-resistant foaming agent comprises the following preparation raw materials in percentage by mass:
preferably, the cationic fluorocarbon surfactant comprises quaternary ammonium salt cationic fluorocarbon surfactant, sodium vinyl sulfonate or perfluoroalkyl quaternary ammonium iodide.
The invention also provides a preparation method of the temperature-resistant salt-resistant foaming agent in the technical scheme, which comprises the following steps:
and mixing maleic acid, dodecanol, p-toluenesulfonic acid, salicylic acid, isoamylol, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water to obtain the temperature-resistant salt-resistant foaming agent.
Preferably, the mixing comprises the steps of:
carrying out first mixing on maleic acid and dodecanol to obtain a first solution;
carrying out second mixing on the first solution, p-toluenesulfonic acid, salicylic acid and isoamylol to obtain a second solution;
and thirdly mixing the second solution, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water to obtain the temperature-resistant salt-tolerant foaming agent.
Preferably, the temperature of the first mixing is 47-57 ℃, and the time is 4-6 h.
Preferably, the second mixing process comprises the following steps:
fourthly mixing the first solution and p-toluenesulfonic acid to obtain a fourth solution;
carrying out fifth mixing on the fourth solution and salicylic acid to obtain a fifth solution;
and carrying out sixth mixing on the fifth solution and isoamylol to obtain a second solution.
Preferably, the fourth mixing preferably comprises the steps of:
dissolving p-toluenesulfonic acid in water to obtain a p-toluenesulfonic acid aqueous solution;
dropwise adding the p-toluenesulfonic acid aqueous solution into the first solution to obtain a fourth solution;
the dropping rate is 30-45 drops/min.
Preferably, the third mixing process comprises the following steps:
performing seventh mixing on the second solution, the sodium dodecyl sulfate and the cationic fluorocarbon surfactant to obtain a seventh solution;
and mixing the seventh solution and water for the eighth time to obtain the temperature-resistant salt-resistant foaming agent.
The invention also provides the application of the temperature-resistant salt-tolerant foaming agent in the technical scheme or the temperature-resistant salt-tolerant foaming agent prepared by the preparation method in the technical scheme in gas field development.
The temperature-resistant salt-resistant foaming agent provided by the invention comprises the following preparation raw materials in percentage by mass: 10-15% of dodecanol, 8-12% of maleic acid, 3-6% of salicylic acid, 25-33% of isoamyl alcohol, 18-22% of p-toluenesulfonic acid, 0.5-3% of sodium dodecyl sulfate, 0.5-3% of a cationic fluorocarbon surfactant and the balance of water. The temperature-resistant salt-resistant foaming agent is obtained under the combined action of the raw material components with specific contents, and has good bubble stability and liquid carrying capacity under the conditions of high temperature and high salinity. The stability of the foaming agent is greatly influenced by the temperature, particularly, the foaming amount of the foaming agent is nearly zero within 3-5 min when the temperature is over 60 ℃, and the association between molecules of the foaming agent and the hydration of a hydrophilic group are increased, so that the high temperature resistance of the foaming agent is improved. The method adopts simulated formation water to test the performance of the foaming agent, wherein the temperature of the simulated formation water is 180 ℃, the mineralization degree is 150000g/L, when the mass concentration of the foaming agent in the simulated formation water is 0.3g/L, the surface tension of bubbles is 20.9-21.8 mN/m, the height of the foam is 200-235 mm when the foam foams for 3min, and the liquid carrying amount of the foam is 86-90 mL.
Detailed Description
The invention provides a temperature-resistant salt-resistant foaming agent which comprises the following preparation raw materials in percentage by mass:
in the present invention, conventional commercially available products are used for each component unless otherwise specified.
The preparation raw material of the temperature-resistant salt-resistant foaming agent comprises 10-15% of dodecanol by mass percentage, and preferably 11-13%.
The preparation raw material of the temperature-resistant salt-resistant foaming agent comprises 8-12% of maleic acid by mass percentage, and preferably 9-10%.
The preparation raw materials of the temperature-resistant salt-resistant foaming agent comprise 3-6% of salicylic acid by mass percentage, and preferably 4-5%.
The preparation raw materials of the temperature-resistant salt-tolerant foaming agent comprise 25-33% of isoamylol by mass percentage, and the preferable content is 26-30%.
The preparation raw material of the temperature-resistant salt-resistant foaming agent comprises 18-22% of p-toluenesulfonic acid by mass percentage, and preferably 19-20%.
The preparation raw material of the temperature-resistant salt-resistant foaming agent comprises 0.5-3% of lauryl sodium sulfate by mass percentage, and preferably 1-2.5%.
The preparation raw materials of the temperature-resistant salt-tolerant foaming agent comprise 0.5-3% of cationic fluorocarbon surfactant, preferably 1-2.5%; the cationic fluorocarbon surfactant preferably comprises a quaternary ammonium salt cationic fluorocarbon surfactant, sodium vinyl sulfonate or perfluoroalkyl quaternary ammonium iodide. In the invention, the hydrophilic group in the cationic fluorocarbon surfactant is inserted into water, the lipophilic group stands on the water surface, and a surface with the lipophilic groups closely arranged is formed on the surface of the water, and the surface is equivalent to the surface of alkane, so that the surface tension of the liquid is reduced, and oil-in-water emulsion, namely bubbles, is easy to form; the formation of such bubbles is less affected by the temperature and mineralization of the liquid.
The preparation raw materials of the temperature-resistant salt-resistant foaming agent comprise the balance of water in percentage by mass. In the present invention, the water is preferably deionized water.
The invention also provides a preparation method of the temperature-resistant salt-resistant foaming agent in the technical scheme, which comprises the following steps:
and mixing maleic acid, dodecanol, p-toluenesulfonic acid, salicylic acid, isoamylol, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water to obtain the temperature-resistant salt-resistant foaming agent.
In the present invention, the process of mixing preferably comprises the steps of:
carrying out first mixing on maleic acid and dodecanol to obtain a first solution;
carrying out second mixing on the first solution, p-toluenesulfonic acid, salicylic acid and isoamylol to obtain a second solution;
and thirdly mixing the second solution, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water to obtain the temperature-resistant salt-tolerant foaming agent.
The method comprises the steps of carrying out first mixing on maleic acid and dodecanol to obtain a first solution. In the invention, the temperature of the first mixing is preferably 47-57 ℃, more preferably 50-52 ℃, and the time is preferably 4-6 hours, more preferably 4.5-5 hours. In the invention, the first mixing is preferably carried out under stirring, and the rotation speed of the stirring is preferably 175-185 r/min, and more preferably 180 r/min.
After the first solution is obtained, the first solution, the p-toluenesulfonic acid, the salicylic acid and the isoamyl alcohol are subjected to second mixing to obtain a second solution. In the present invention, the process of the second mixing preferably includes the steps of:
fourthly mixing the first solution and p-toluenesulfonic acid to obtain a fourth solution;
carrying out fifth mixing on the fourth solution and salicylic acid to obtain a fifth solution;
and carrying out sixth mixing on the fifth solution and isoamylol to obtain a second solution.
The first solution and p-toluenesulfonic acid are subjected to fourth mixing to obtain a fourth solution. In the present invention, the fourth mixing preferably comprises the steps of:
dissolving p-toluenesulfonic acid in water to obtain a p-toluenesulfonic acid aqueous solution;
dropwise adding the p-toluenesulfonic acid aqueous solution into the first solution to obtain a fourth solution;
the dropping rate is 30-45 drops/min.
The invention dissolves p-toluenesulfonic acid in water to obtain p-toluenesulfonic acid aqueous solution. The present invention is not particularly limited in the manner of dissolution, as long as dissolution can be achieved. In the present invention, the water is preferably deionized water. In the invention, the mass percentage of the p-toluenesulfonic acid in the p-toluenesulfonic acid aqueous solution is preferably 50-65%, and more preferably 55-60%.
After the p-toluenesulfonic acid aqueous solution is obtained, the p-toluenesulfonic acid aqueous solution is dropwise added into the first solution to obtain the fourth solution. In the invention, the dripping speed is preferably 30-45 drops/min, and more preferably 35-40 drops/min. In the present invention, the dropping is preferably performed under the condition of stirring, and the rotation speed of the stirring is preferably in accordance with the rotation speed of the stirring in the first mixing process. In the invention, the temperature of the first solution in the dripping process is preferably 78-82 ℃, more preferably 80 ℃, and the dripping time is preferably 4-6 hours, more preferably 4.5-5 hours.
After the fourth solution is obtained, the fifth solution is obtained by fifth mixing the fourth solution and salicylic acid. In the present invention, the temperature of the fifth mixing is preferably the same as the temperature of the fourth mixing; the time for the fifth mixing is preferably 1 to 4 hours, and more preferably 2 to 3 hours. In the present invention, the fifth mixing is preferably performed under stirring conditions, and the rotation speed of the stirring is preferably the same as the rotation speed of the stirring in the first mixing process.
After the fifth solution is obtained, the fifth solution and isoamyl alcohol are mixed for the sixth time to obtain a second solution. In the present invention, the temperature of the sixth mixing is preferably the same as the temperature of the fourth mixing; the time for the sixth mixing is preferably 28 to 30min, and more preferably 30 min. In the present invention, the sixth mixing is preferably performed under stirring conditions, and the stirring rotation speed is preferably the same as the stirring rotation speed in the first mixing process.
After the second solution is obtained, the second solution, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water are subjected to third mixing to obtain the temperature-resistant salt-tolerant foaming agent. In the present invention, the third mixing process preferably includes the steps of:
performing seventh mixing on the second solution, the sodium dodecyl sulfate and the cationic fluorocarbon surfactant to obtain a seventh solution;
and mixing the seventh solution and water for the eighth time to obtain the temperature-resistant salt-resistant foaming agent.
The second solution, the sodium dodecyl sulfate and the cationic fluorocarbon surfactant are mixed for the seventh mixing to obtain a seventh solution. In the invention, the temperature of the seventh mixing is preferably 47-53 ℃, and more preferably 50 ℃; the time for the seventh mixing is preferably 0.5 to 2 hours, and more preferably 1 to 1.5 hours. In the present invention, the seventh mixing is preferably performed under stirring conditions, and the rotation speed of the stirring is preferably the same as the rotation speed of the stirring in the first mixing process. The mixing order of the seventh mixing is not particularly limited in the present invention as long as the seventh mixing can be mixed uniformly.
And after the seventh solution is obtained, eighth mixing is carried out on the seventh solution and water to obtain the temperature-resistant salt-resistant foaming agent. In the invention, the temperature of the eighth mixing is preferably 47-53 ℃, and more preferably 50 ℃; the time for the eighth mixing is preferably 28 to 32min, and more preferably 30 min. In the present invention, the eighth mixing is preferably performed under stirring conditions, and the rotation speed of the stirring is preferably the same as the rotation speed of the stirring in the first mixing process.
The invention also provides the application of the temperature-resistant salt-tolerant foaming agent in the technical scheme or the application of the temperature-resistant salt-tolerant foaming agent prepared by the preparation method in the technical scheme in gas field development.
The temperature-resistant salt-resistant foaming agent provided by the invention still has good bubble stability and liquid carrying capacity under the conditions of high temperature and high salinity, and can be well applied to gas fields under the geological conditions of high salinity. In the invention, the high temperature is preferably 90-180 ℃, more preferably 180 ℃, and the hypersalinity is preferably 150000 mg/L. The mass concentration of the temperature-resistant salt-tolerant foaming agent in formation water is preferably 0.1-0.5 g/L, and more preferably 0.2-0.3 g/L. The method of the present invention is not particularly limited, and may be carried out by a method known to those skilled in the art.
In order to further illustrate the present invention, the following embodiments are described in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
Mixing 10% of maleic acid and 11% of dodecanol, and mixing for 4 hours at the temperature of 52 ℃ and the rotating speed of 175r/min to obtain a first solution;
dissolving p-toluenesulfonic acid in deionized water to obtain a p-toluenesulfonic acid aqueous solution with the mass percentage concentration of 50%; dropwise adding the p-toluenesulfonic acid aqueous solution into the first solution at the temperature of 80 ℃ at the speed of 35 drops/min (the percentage content of the p-toluenesulfonic acid in the total mass of the raw materials is 22%), and mixing for 4.5h at the speed of 175r/min to obtain a fourth solution; mixing the fourth solution and 3% salicylic acid at 80 ℃ and 175r/min for 3h to obtain a fifth solution; mixing the fifth solution and 26% isoamyl alcohol at 80 ℃ and 175r/min for 30min to obtain a second solution;
mixing the second solution, 1% sodium dodecyl sulfate and 2.5% sodium vinyl sulfonate at 50 ℃ and 175r/min for 1.5h to obtain a seventh solution; and mixing the seventh solution and the balance of water for 30min at the temperature of 50 ℃ and at the speed of 175r/min to obtain the temperature-resistant salt-resistant foaming agent.
Example 2
Mixing 15% of maleic acid and 13% of dodecanol, and mixing for 4.5 hours at the temperature of 52 ℃ and the rotating speed of 178r/min to obtain a first solution;
dissolving p-toluenesulfonic acid in deionized water to obtain a 58 mass percent aqueous solution of the p-toluenesulfonic acid; dripping the p-toluenesulfonic acid aqueous solution into a first solution with the temperature of 80 ℃ (the percentage content of p-toluenesulfonic acid in the total mass of raw materials is 18%) at the rate of 30 drops/min, and mixing for 4h under the condition of 178r/min to obtain a fourth solution; mixing the fourth solution and 5% salicylic acid at 80 ℃ and 178r/min for 2h to obtain a fifth solution; mixing the fifth solution and 25% isoamyl alcohol at 80 ℃ and 178r/min for 30min to obtain a second solution;
mixing the second solution, 0.5% sodium dodecyl sulfate and 3% sodium vinyl sulfonate at 50 ℃ and 178r/min for 0.5h to obtain a seventh solution; and mixing the seventh solution and the balance of water for 30min at the temperature of 50 ℃ and at the speed of 178r/min to obtain the temperature-resistant salt-resistant foaming agent.
Example 3
Mixing 11% of maleic acid and 10% of dodecanol, and mixing for 6 hours at the temperature of 52 ℃ and the rotating speed of 180r/min to obtain a first solution;
dissolving p-toluenesulfonic acid in deionized water to obtain a p-toluenesulfonic acid aqueous solution with the mass percentage concentration of 60%; dropwise adding the p-toluenesulfonic acid aqueous solution into the first solution with the temperature of 81 ℃ (the percentage content of p-toluenesulfonic acid in the total mass of raw materials is 25%) at the rate of 45 drops/min, and mixing for 5h under the condition of 180r/min to obtain a fourth solution; mixing the fourth solution and 4% salicylic acid at 80 ℃ and 180r/min for 4h to obtain a fifth solution; mixing the fifth solution and 33% isoamyl alcohol at 80 ℃ and 180r/min for 30min to obtain a second solution;
mixing the second solution, 2.5% sodium lauryl sulfate and 0.5% sodium vinyl sulfonate at 50 ℃ and 180 x r/min for 1h to obtain a seventh solution; and mixing the seventh solution and the balance of water for 30min at the temperature of 50 ℃ and at the speed of 180r/min to obtain the temperature-resistant salt-resistant foaming agent.
Example 4
Mixing 13% of maleic acid and 15% of dodecanol, and mixing for 5 hours at the temperature of 52 ℃ and the rotating speed of 185r/min to obtain a first solution;
dissolving p-toluenesulfonic acid in deionized water to obtain a p-toluenesulfonic acid aqueous solution with mass percentage concentration of 55%; dripping the p-toluenesulfonic acid aqueous solution into a first solution with the temperature of 80 ℃ (the percentage content of p-toluenesulfonic acid in the total mass of raw materials is 19%) at the rate of 40 drops/min, and mixing for 6h under the condition of 185r/min to obtain a fourth solution; mixing the fourth solution and 6% salicylic acid at 80 ℃ and 185r/min for 1h to obtain a fifth solution; mixing the fifth solution and 30% isoamyl alcohol at 80 ℃ and 185r/min for 30min to obtain a second solution;
mixing the second solution, 3% sodium dodecyl sulfate and 2.3% sodium vinyl sulfonate agent at 50 ℃ and 185r/min for 2h to obtain a seventh solution; and mixing the seventh solution and the balance of water for 30min at the temperature of 50 ℃ and at the speed of 185r/min to obtain the temperature-resistant salt-resistant foaming agent.
Example 5
Mixing 12% of maleic acid and 12% of dodecanol, and mixing for 5.5 hours at the temperature of 52 ℃ and the rotating speed of 183r/min to obtain a first solution;
dissolving p-toluenesulfonic acid in deionized water to obtain a 65 mass percent aqueous solution of the p-toluenesulfonic acid; dripping the p-toluenesulfonic acid aqueous solution into the first solution with the temperature of 80 ℃ (the percentage content of p-toluenesulfonic acid in the total mass of raw materials is 20%) at the speed of 38 drops/min, and mixing for 5.5h under the condition of 183r/min to obtain a fourth solution; mixing the fourth solution and 5% salicylic acid at 80 ℃ and 183r/min for 2.5h to obtain a fifth solution; mixing the fifth solution and 27% isoamyl alcohol at 80 ℃ and 183r/min for 30min to obtain a second solution;
mixing the second solution, 2.3% sodium dodecyl sulfate and 1% sodium vinyl sulfonate agent at 50 ℃ and 183r/min for 0.8h to obtain a seventh solution; and mixing the seventh solution and the balance of water at 50 ℃ and 183r/min for 30min to obtain the temperature-resistant salt-resistant foaming agent.
Comparative example 1
According to the mass percentage, 8 percent of dodecyl dimethyl amine oxide, 12 percent of tetradecyl dimethyl betaine, 0.1 percent of glycerol, 10 percent of methanol and 69.9 percent of water are mixed for 15 hours under the conditions that the rotating speed is 180r/min and the temperature is 80 ℃, so as to obtain the foaming agent.
Test example
The mineralization degree of formation water applied by the existing foaming agent is usually 70000-120000 mg/L, and the foam drainage test evaluation is carried out under the condition of simulating formation water with the mineralization degree of 150000mg/L, and the concrete steps are as follows: foaming agent is injected from a gas well casing, defoaming agent is injected into a ground gas production line, and foam discharging is carried out without adjusting an original underground structure.
The invention detects the performances of the temperature-resistant salt-resistant foaming agent prepared in the examples 1-5 and the foaming agent prepared in the comparative example 1 according to SY/T6465-2000, and specific results are listed in tables 1-6.
TABLE 1 foam discharging performance of foaming agent at 90 deg.C of formation water and 0.1g/L of foaming agent mass concentration
As can be seen from the data in Table 1, under the conditions that the test temperature is 90 ℃ and the mass concentration of the foaming agent is 0.1g/L, the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 30s is 178 to 187mm, and the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 3min is 159 to 167 mm; the foaming agent prepared in the comparative example 1 has the foam height of 125mm after the foam row is 30s, and the foaming agent prepared in the comparative example 1 has the foam height of 114mm after the foam row is 3 min; the foam stabilizing height value of the foaming agent prepared in the embodiments 1-5 is reduced to a small extent, and the foaming agent provided by the invention is proved to have good stability.
The liquid carrying amount of the foam generated by the temperature-resistant salt-tolerant foaming agent prepared in examples 1-5 is 69-71 mL, the surface tension of the generated foam is 22.2-23.6 mN/m, the liquid carrying amount of the foam generated by the foaming agent prepared in comparative example 1 is 39mL, and the surface tension of the generated foam is 25.7 mN/m. It is evident that the blowing agents provided by the present invention produce foams having higher liquid carrying capacity and lower surface tension.
TABLE 2 foam discharging performance of foaming agent under the conditions of 90 ℃ of formation water temperature and 0.2g/L of foaming agent mass concentration
As can be seen from the data in Table 2, under the conditions that the test temperature is 90 ℃ and the concentration of the foaming agent is 0.2g/L, the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 30s is 198-207 mm, and the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 3min is 182-189 mm; the foaming agent prepared in the comparative example 1 has the foam height of 145mm after the foam row is 30s, and the foaming agent prepared in the comparative example 1 has the foam height of 124mm after the foam row is 3 min; the foam stabilizing height value of the foaming agent prepared in the embodiments 1-5 is reduced to a small extent, and the foaming agent provided by the invention is proved to have good stability.
The liquid carrying amount of the foam generated by the temperature-resistant salt-tolerant foaming agent prepared in examples 1-5 is 69-71 mL, the surface tension of the generated foam is 21.2-22.6 mN/m, the liquid carrying amount of the foam generated by the foaming agent prepared in comparative example 1 is 46mL, and the surface tension of the generated foam is 24.8 mN/m. It is evident that the foaming agents prepared in examples 1-5 produce foams with higher liquid carrying capacity and lower surface tension.
TABLE 3 foam discharging performance of foaming agent under the conditions of 90 ℃ of formation water temperature and 0.3g/L of foaming agent mass concentration
As can be seen from the data in Table 3, under the conditions that the test temperature is 90 ℃ and the mass concentration of the foaming agent is 0.3g/L, the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 30s is 209 to 225mm, and the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 3min is 200 to 215 mm; the foam height of the foaming agent prepared in comparative example 1 after the foam row is 30s is 165mm, and the foam height of the foaming agent prepared in comparative example 1 after the foam row is 3min is 125 mm; the foam stabilizing height value of the foaming agent prepared in the embodiments 1-5 is reduced to a small extent, and the foaming agent provided by the invention is proved to have good stability.
The liquid carrying amount of the foam generated by the temperature-resistant salt-tolerant foaming agent prepared in examples 1-5 is 86-90 mL, the surface tension of the generated foam is 21.6-21.9 mN/m, the liquid carrying amount of the foam generated by the foaming agent prepared in comparative example 1 is 55mL, and the surface tension of the generated foam is 24.7 mN/m.
TABLE 4 foam discharging performance of foaming agent under the conditions of 90 ℃ of formation water temperature and 0.4g/L of foaming agent mass concentration
As can be seen from the data in Table 4, under the conditions that the test temperature is 90 ℃ and the concentration of the foaming agent is 0.4g/L, the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 30s is 229 to 255mm, and the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 3min is 200 to 235 mm; the foaming agent prepared in the comparative example 1 has the foam height of 125mm after the foam row is 30s, and the foaming agent prepared in the comparative example 1 has the foam height of 57mm after the foam row is 3 min; the foam stabilizing height value of the foaming agent prepared in the embodiments 1-5 is reduced to a small extent, and the foaming agent provided by the invention is proved to have good stability.
The liquid carrying amount of the foam generated by the temperature-resistant salt-tolerant foaming agent prepared in examples 1-5 is 86-90 mL, the surface tension of the generated foam is 21.6-21.8 mN/m, the liquid carrying amount of the foam generated by the foaming agent prepared in comparative example 1 is 165mL, and the surface tension of the generated foam is 24.5 mN/m.
TABLE 5 foam discharging performance of foaming agent under the conditions of formation water temperature of 180 ℃ and foaming agent mass concentration of 0.5g/L
As can be seen from the data in Table 5, under the conditions that the test temperature is 180 ℃ and the concentration of the foaming agent is 0.5g/L, the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 30s is 229 to 255mm, and the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 3min is 200 to 235 mm; the foam height of the foaming agent prepared in comparative example 1 after the foam row is 30s is 165mm, and the foam height of the foaming agent prepared in comparative example 1 after the foam row is 3min is 125 mm; the foam stabilizing height value of the foaming agent prepared in the embodiments 1-5 is reduced to a small extent, and the foaming agent provided by the invention is proved to have good stability.
The liquid carrying amount of the foam generated by the temperature-resistant salt-tolerant foaming agent prepared in examples 1-5 is 86-90 mL, the surface tension of the generated foam is 20.4-20.8 mN/m, the liquid carrying amount of the foam generated by the foaming agent prepared in comparative example 1 is 57mL, and the surface tension of the generated foam is 24.3 mN/m.
TABLE 6 foam discharging performance of foaming agent under the conditions of formation water temperature of 180 ℃ and foaming agent mass concentration of 0.3g/L
As can be seen from the data in Table 6, under the conditions that the test temperature is 180 ℃ and the concentration of the foaming agent is 0.3g/L, the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 30s is 229 to 255mm, and the foam height of the temperature-resistant salt-tolerant foaming agent prepared in the embodiments 1 to 5 after the foaming is discharged for 3min is 200 to 235 mm; the foam height of the foaming agent prepared in comparative example 1 after the foam row is 30s is 165mm, and the foam height of the foaming agent prepared in comparative example 1 after the foam row is 3min is 125 mm; the foam stabilizing height value of the foaming agent prepared in the embodiments 1-5 is reduced to a small extent, and the foaming agent provided by the invention is proved to have good stability.
The liquid carrying amount of the foam generated by the temperature-resistant salt-tolerant foaming agent prepared in examples 1-5 is 86-90 mL, the surface tension of the generated foam is 20.9-21.8 mN/m, the liquid carrying amount of the foam generated by the foaming agent prepared in comparative example 1 is 57mL, and the surface tension of the generated foam is 25.3 mN/m.
The data in tables 1 to 6 show that the temperature-resistant salt-tolerant foaming agent provided by the invention has higher liquid carrying capacity and lower surface tension when bubbles are generated under the conditions that the mineralization degree is 150000mg/L and the temperature is 90 to 180 ℃.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (10)
1. The temperature-resistant salt-resistant foaming agent is characterized by comprising the following preparation raw materials in percentage by mass:
2. the temperature-resistant salt-tolerant foaming agent according to claim 1, which comprises the following preparation raw materials in percentage by mass:
3. the temperature and salt resistant foaming agent of claim 1 or 2 wherein the cationic fluorocarbon surfactant comprises a quaternary ammonium salt cationic fluorocarbon surfactant, sodium vinyl sulfonate or perfluoroalkyl quaternary ammonium iodide.
4. The preparation method of the temperature-resistant salt-tolerant foaming agent as claimed in any one of claims 1 to 3, which is characterized by comprising the following steps:
and mixing maleic acid, dodecanol, p-toluenesulfonic acid, salicylic acid, isoamylol, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water to obtain the temperature-resistant salt-resistant foaming agent.
5. The method of claim 4, wherein the mixing comprises the steps of:
carrying out first mixing on maleic acid and dodecanol to obtain a first solution;
carrying out second mixing on the first solution, p-toluenesulfonic acid, salicylic acid and isoamylol to obtain a second solution;
and thirdly mixing the second solution, sodium dodecyl sulfate, a cationic fluorocarbon surfactant and water to obtain the temperature-resistant salt-tolerant foaming agent.
6. The method of claim 5, wherein the first mixing is carried out at a temperature of 47-57 ℃ for 4-6 hours.
7. The method of manufacturing of claim 5, wherein the second mixing process comprises the steps of:
fourthly mixing the first solution and p-toluenesulfonic acid to obtain a fourth solution;
carrying out fifth mixing on the fourth solution and salicylic acid to obtain a fifth solution;
and carrying out sixth mixing on the fifth solution and isoamylol to obtain a second solution.
8. The method of claim 7, wherein the fourth mixing preferably comprises the steps of:
dissolving p-toluenesulfonic acid in water to obtain a p-toluenesulfonic acid aqueous solution;
dropwise adding the p-toluenesulfonic acid aqueous solution into the first solution to obtain a fourth solution;
the dropping rate is 30-45 drops/min.
9. The method of claim 5, wherein the third mixing process comprises the steps of:
performing seventh mixing on the second solution, the sodium dodecyl sulfate and the cationic fluorocarbon surfactant to obtain a seventh solution;
and mixing the seventh solution and water for the eighth time to obtain the temperature-resistant salt-resistant foaming agent.
10. The application of the temperature and salt resistant foaming agent as claimed in any one of claims 1 to 3 or the temperature and salt resistant foaming agent prepared by the preparation method as claimed in any one of claims 4 to 9 in gas field development.
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| CN102212356A (en) * | 2011-04-08 | 2011-10-12 | 西安石油大学 | High temperature foaming agent |
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| CN104087270A (en) * | 2014-07-17 | 2014-10-08 | 中国石油大学(华东) | Salt-tolerance temperature-resistance foaming agent |
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| CN106433580A (en) * | 2016-08-17 | 2017-02-22 | 富象油气技术服务有限公司 | Foaming agent for oilfield, and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212356A (en) * | 2011-04-08 | 2011-10-12 | 西安石油大学 | High temperature foaming agent |
| CN102676142A (en) * | 2012-05-28 | 2012-09-19 | 中国石油天然气股份有限公司 | Condensate oil foam discharging agent applied to natural gas extraction |
| CN104087270A (en) * | 2014-07-17 | 2014-10-08 | 中国石油大学(华东) | Salt-tolerance temperature-resistance foaming agent |
| CN105199701A (en) * | 2015-10-21 | 2015-12-30 | 西安长庆化工集团有限公司 | High-temperature resistant, hypersalinity resistant and gas condensate resistant foam scrubbing agent and preparation method thereof |
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